Amazon's Blu Ray listing may just be a placeholder so people can sign up for notification of an eventual release rather than a listing of an actual upcoming product. If a Blu Ray release is coming, it would probably mean that Paramount thinks NCIS is selling well enough on DVD to give it a shot on Blu Ray. And if it's selling well on DVD, they aren't going to stop DVD releases in favor of a Blu Ray-only release.
This weeks episode was one of the best in the series as a whole. Seeing the spotlight on Palmer and how he handled being the target ... it also showed a deeper connection between Gibbs and how he treats the other members that are involved with his team. Abby, McGee, David, Palmer, Ducky ... I have to admit that this is one of the better series on television right now, besides Bones, that I enjoy watching week from week.